Boiler feed-water purifier



C. E. SARGE NT. BQILER FEED WATER PURIFIER. APPLICATION FILEVD AUG.9. 19:9.

1,400,993 Patented, Dec, 20, 1921.

BOILER FEED-WATER PURIFIER.

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Specification of Letters Patent.

' Patented Dec. 2d, 1921.

Application filed August 9, 1919. Serial No. 316,290.

To 117/ whom it may co /mm:

l e it known that l, (nannies E. Sanunrvr, a citizen of the United States, residlng at 221) N. Delaware street, lndianapolis, in the county of iilarion and State of lndiana, have invented a new and useful Improvement in Boiler Feed-Water Purifiers, of which the following is a specification.

My invention relates to certain new and useful improvements in boiler feed water purifiers and is fully descril'ied and explained in the specification and shown in the accom panying drawing which is a vertical section through my improved device.

Referring to the drawings, 1 is a boiler which is fed through a pipe 2 coni'iected with a body 3 oi the purifier. 4 is a pipe-by which feed water is admitted from a suitable pump. :7 is a pipe entering the boiler at a point above the normal low-water in the boiler and having a slot 6 on its lower portion through which hot water from the )oiler can pass out and into the purifier. At ntcrvals when the level of the water in the ioiler is low such scum as may occur on the ;op ot' the boiler water will also pass out .hrough this slot into the purifier.

()n the upper part of the body of the pu- 'ifier there is a short cylindrical extension in the center of which is an injector nozzle l having connection with the pipe 5. The xteii n 7 communicates with a downvardly opening hell or skirt 9 within the Iody oi the purifier, and terminating well bove the lower part thereof. 10 is a mud low-oil opening trom' the body of the pnilier, the same having a slightly restricted ntranco, and 11 is a scum blow-oil pipe 'innected with the mud blow-oil pipe at the oint of its restriction, and terminating near no upper end of the body of the purifier.

In the normal operation of the present evice. assuming that no water is being fed 1 by the pump. and that the mud blow-oil closed, there is a slow thern'lo-siphon cirilation from the boiler through the pipe 5, 1e hell or skirt 7. the large lower part or My of the purifier back to the boiler irough the pipe 2. The'purifier being relavely cooler than the boiler there is no opn-tunity for an impurities to bake on to e surfaces of the purifier, and an opportuty is afforded in the quiescent body of the n'ilier tor the heavy impurities like mud settle to the bottom, and for the lighter ipurities like scum, to accumulate in the top while the purified water passes out from the center. The provision of the enlarged hell or skirt 9 greatly reduces the velocity of the water entering the purifier so that the body of water within the purifier is very quiescent, and there is the greatest opportunity afforded for separation.

Then water is being fed in through the pipe 4 the operation is in general as that described excepting that the entering water is first heated by being brought in immediate contact with the outside of the nozzle 8 beside which it moves until thoroughly heated up, and thereupon it is mixed in the mouth of the skirt or hell 9 with the incoming hot water from the boiler; the two move together down the skirt where their velocity drops very greatly. By this arrangement the incoming feed water from the pipe at is thoroughly heated and thus discharged of soluble matter which can be precipitated by heat, which precipitated matter. is kept within the purifier as already stated and does not pass on into the boiler.

From time to time in the operation of the device it will be desirable to blow oil the mud which had accumulated in the bottom, andthis can be done by opening the valve controlling the mud blow-off opening 10. The rush oi material within thisopening sets up a'suction in the scum blow-off pipeso that simultaneously with the removal of the mud from the bottom the liquid from the extreme upper part of the device, in-

cluding the scum which is there held, is removed. In this manner it is possible to remove the heavy mud from the bottom and the light scum from the top while still preserving a quiescent and clear intermediate portion.

I realize that considerable variation is possible in the details of the construction herein shown, and I do not intend to limit myself thereto, except as pointed out in the following claims, in which it is my intention to claim all the novelty inherent in the device as broadly as is permitted by the state of the art.

What I claim as new and desire to secure by Letters Patent is:

1. A feed water-heater and purifier for boilers comprising a hollow body having at its lower-end a blow-off opening, means for connection with the lower part of a boiler,

a downwardly opening vertical nozzle and means for connecting same with the upper the discharge end of the nozzle, and around the body thereof and an enlarged relatively short bell in the body in which the feed water and water from the nozzle mix and through which they move at low velocity,'

whereby to reduce the disturbance caused by the entering of such body of water to that within the purifier to the minimum.

2. A feed water heater and purifier for boilers comprising a hollow body having at its lower end a blowofi' opening and means for connection with the lower part of a boiler, a downwardly opening vertical nozzle receiving water from the upper part of a boiler and from a point above the low water level therein, an annular feed water heating chamber surrounding the nozzle and means to supply feed water thereto above the discharge end of the nozzle and around the body thereof and an enlarged relatively short bell in the body in which the feed water and water from the nozzle mix and through which they move at low velocity, whereby to reduce the disturbance caused by the-entering of such body of water to that Within the purifier to the minimum.

3. A feed water heater and purifier comprising a hollow body having at its lower end a blow-oft opening and having means below its upper end for communicating with the lower part of a boiler, a downwardly opening vertical nozzle communicating with the upper part of a boiler, an annular feed water heating chamber surrounding the nozzle and means to supply feed vwater thereto above the discharge end of the nozzle, and

an enlarged relatively short bell in the body in which the feed water and water from the nozzle mix and through which they move at low velocity, and means to remove floating impurities from the upper end of the body.

4. A fed water heater and purifier comprising a hollow body having at its lower end a blow-oft opening and means for connecting its upper end with the lower part of a boiler, a downwardly opening vertical nozzle receiving water from the upper part of a boiler, an annular feed water heating chamber surrounding the nozzle and means to supply feed water thereto above the dischargeend ofthe nozzle, an enlarged relatively short bell in the body in which the feed water and the water from the nozzle mix and through which they move at low ve locity, a restriction vin the blow-ofi' opening and a scum blow-off rising therefrom to the upper end of the body.

5. A feed water heater and purifier comprising a hollow body having at its lower end a blow-01f opening and having also a means below its upper end for connection with the lower part of a boiler, a down wardly opening vertical nozzle communicating with the upper part of a boiler to receive water therefrom, thecommunication being above the low water level in the boiler, an annular feed water heating chamber surrounding the nozzle and means to supply feed water thereto above the discharge end of the nozzle, an enlarged relatively short bell in the body in which, the feed water and the water from the nozzle mix and through which they move at low velocity, a restriction in the blow-oft opening, and a scum blow-off arising therefrom to the upper end of the body.

CHARLES E. SARGENT. 

